If you accidentally buy an adult ticket for someone who is a junior can they still use it to get in?

1 E-Ticket available

I’ve got 2 hard copy tickets for sale. $150 - pick up Sunshine Coast.

Is anyone selling hard copy tickets?

probably a stupid question but does anyone know if i can still go through the 18+ line and buy alcohol on a junior ticket? (with them being the same price i'm assuming you can, but thought i'd check)
bought it off resale and it didn't tell me it was a junior until i saw the ticket.